An improvement of a piecewise curvature-corrected CMOS bandgap reference

Abstract

Abstract:In the current paper, an improvement of piecewise curvature-corrected CMOS bandgap reference (BGR) circuit is proposed. The circuit utilizes piecewise nonlinear curvature-corrected current (PNCCC) in a conventional BGR with a current control circuit, which compensates for the voltage reference at a higher temperature range. The current control circuit (CCC) is used to reduce the total current at low temperature when the PNCCC generator is inactive. The proposed circuit is realized in CMOS 0.13 µm and has been verified to be able to save power consumption by 18.6% compared with a circuit without the current control circuit.

A 1.6 ppm/°C bandgap voltage reference for an extended operating temperature range

“…The nonlinear voltage across the p-n diode, which is explained in [4], causes the variation in voltage reference. The proposed circuits in [5,6,7,8,9,10] have been proven to compensate for the nonlinear voltage, which give optimum output voltage at operating temperatures between !50°C to 125°C. However, with increased temperature to 125°C, the circuit suffers from a huge output voltage variation because of uncontrolled nonlinear current generators.…”

A reference voltage source and its output buffer for pipeline ADC

“…The accuracy of reference voltage source which supply reference voltage for the key portion of pipeline ADC will directly influence the performance of the overall pipeline ADC. As an important part of high-speed and high-precision ADC, stable voltage reference source [1] has always been the focus of research in the field of analog-digital mixed signal [2][3] .…”